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Stability criterion for white dwarfs in Palatini f(R) gravity

Sarmah, L and Kalita, S and Wojnar, A (2022) Stability criterion for white dwarfs in Palatini f(R) gravity. In: Physical Review D, 105 (2).

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Official URL: https://doi.org/10.1103/PhysRevD.105.024028


Recent observations of several peculiar over- and underluminous type Ia supernovae infer indirect evidence for the violation of the Chandrasekhar mass limit by suggesting the existence of super- and sub-Chandrasekhar limiting mass white dwarfs. In an attempt to explain these phenomena in the context of general relativistic extensions, we study these objects in Palatini f(R) gravity. We obtain the super- and sub-Chandrasekhar limiting masses as well as the dynamical instability criteria for white dwarfs in the given gravitational theory. We further demonstrate that the conventional positivity condition �M/��c>0 with M being the WD�s mass with central density �c is also a valid criterion for stability in Palatini gravity. © 2022 American Physical Society

Item Type: Journal Article
Publication: Physical Review D
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to Authors
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Feb 2022 11:52
Last Modified: 10 Feb 2022 11:52
URI: http://eprints.iisc.ac.in/id/eprint/71155

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